Calculation of current total harmonic distortion for a single-phase multilevel inverter with LCL-Filter

Ramazan Abdikarimuly, Yakov L. Familiant, Alex Ruderman, Boris Reznikov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

This paper addresses calculation of current Total Harmonic Distortion (THD) for a single-phase multilevel PWM inverter with LCL-filter. Analytical approach introduced in late 1980s for a 2-level inverter with inductance dominated load is generalized for a single-phase multilevel inverter with an arbitrary number of voltage levels accounting for the smoothing effect of LCL-filter. Though the obtained closed-form analytical solutions initially assume (infinitely) large ratio of switching and fundamental frequencies, they are practically accurate for the ratios of (apparent) switching and fundamental frequencies larger than 25-30. Also suggested are simple accurate Bessel function approximations. The formulas clearly reveal a single-phase PWM inverter current THD dependence on LCL-filter parameters and modulation index for an arbitrary level count and are easily modified to cover a grid-connected case.

Original languageEnglish
Title of host publicationProceedings - 2016 IEEE International Power Electronics and Motion Control Conference, PEMC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages63-68
Number of pages6
ISBN (Electronic)9781509017980
DOIs
Publication statusPublished - Nov 21 2016
Externally publishedYes
Event17th IEEE International Power Electronics and Motion Control Conference, PEMC 2016 - Varna, Bulgaria
Duration: Sep 25 2016Sep 28 2016

Conference

Conference17th IEEE International Power Electronics and Motion Control Conference, PEMC 2016
CountryBulgaria
CityVarna
Period9/25/169/28/16

Keywords

  • Grid-Connected Inverter
  • LCL-Filter
  • Multilevel Inverter
  • Pulse Width Modulation
  • Total Harmonic Distortion

ASJC Scopus subject areas

  • Control and Optimization
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology

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